The Ratana Varabhorn Order of Merit (Thai: เครื่องราชอิสริยาภรณ์ตรารัตนวราภรณ์; RTGS: Rattanawaraphon) was established on 1 August 1911 by King Rama VI of The Kingdom of Siam (now Thailand) to reward personal service to the sovereign.

Members are entitled to use the postnominals ร.ว.

The decoration consists of a single class (Knight).

The insignia for this class is a pendant on the order chain or on neck ribbon.

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